/Engine/Source/Editor/CurveEditor/Public/Tree/CurveEditorTree.h
Add a new filter to this tree. Does not run the filter (and thus update any tree views) until RunFilters is called.
void AddFilter ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FCurveEditorTreeFilter](API\Editor\CurveEditor\Tree\FCurveEditorTreeFilter) > NewFilter )